SB2018100920 - Privilege escalation in Microsoft Windows Win32k

Description

This security bulletin contains information about 1 security vulnerability.

1) Use-after-free (CVE-ID: CVE-2018-8453)

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists due to a use-after free error in win32kfull!xxxDestroyWindow Win32k component. A local user can run a specially crafted application, trigger memory corruption and execute arbitrary code in kernel mode.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note: the vulnerability has been actively exploited in the wild.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8453
• https://securelist.com/cve-2018-8453-used-in-targeted-attacks/88151/